Circuit board



FIG. 1 is a front elevational view of a circuit board showing our newdesign;

FIG. 2 is a perspective view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof; and,

FIG. 7 is a right side elevational view thereof.

The broken lines shown in the drawings depict portions of the circuitboard that form no part of the claimed design.

CLAIM The ornamental design for a circuit board, as shown and described.